Escape $ in snippet - visual-studio-code

Question

I'm trying to escape the $ character in my snippets but I cannot seem to get it correct.
If I use \$ as it looks like I should be from the documentation, I get the error:
file: path/to/snippets/php.json'
severity: 'Error'
message: 'Invalid escape character in string'
And no $ appear in my snippet.
If I use $$ found from this answer, I get a $ to show up but it thinks that the text immediately following is a tabstop.
If I use $\ it works but I have to have a character that is part of an escape sequence immediately following. So if I wanted $factory, I would need to do $\ffactory. \f seems to be the best as it does not effect the layout of my snippet.
I'm pretty sure that I am missing what needs to be done here.
My snippet for reference:
"factory" :{
"prefix": "factory",
"body": [
"\$factory->define($1, function (Faker\\Generator \$faker){",
"\treturn [",
"\t\t$2,",
"\t];",
"}"
],
"description": "Creates Model factory"
},

Answer 1

After much trial and error, I found that using \\$ will give me the desired results. So if I wanted $test in my snippet output, with test not being a tabstop, I would need \\$test snippet definition body:
"factory" :{
"prefix": "factory",
"body": [
"\\$factory->define($1, function (Faker\\Generator \\$faker){",
"\treturn [",
"\t\t$2,",
"\t];",
"});"
],
"description": "Creates Model factory"
},